Effects of cold leg steam and flow baffles on ECC delivery in a simulated multiloop PWR geometry with steam upflow and superheated walls. Quarterly progress report, April 1, 1975--June 30, 1975

Technical Report · Tue Jul 01 04:00:00 EDT 1975

OSTI ID:4156695

Block, J A; Crowley, C J

The Creare program is studying ECC bypass and downcomer effects in a $sup 1$$/$$sub 15$-scale, planar, multiple leg injection model of a Pressurized Water Reactor. Specifically, the parameters being investigated are ECC injection, steam upflow, cold leg steam, flow baffles (as an alternate ECCS concept), and superheated downcomer walls. The work reported here involved experiments investigating the effects of cold leg steam and flow baffles, both with superheated and with saturated downcomer walls. The results of tests with cold leg steam were similar to tests injecting water of a subcooling equivalent to that of the cold leg steam/ECC water mixture in the cold legs (despite oscillations of a liquid plug in the cold legs in some cases). All three downcomer baffle designs tested helped water delivery in this facility, although it is not clear that the benefits would also occur, say, with a scaled lower plenum. 11 references. (auth)

• Research Organization: Creare, Inc., Hanover, N.H. (USA)
• NSA Number: NSA-33-002424
• OSTI ID: 4156695
• Report Number(s): CREARE-TN--214
• Country of Publication: United States
• Language: English

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